To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 3 Video of the mechanical mitral valve in which the vegetation can be seen moving in the right upper corner of the image and the color Doppler shows the perivalvular leak to the left of the vegetation. View Video 3 at http://movie-usa.glencoesoftware.com/video/10.1530/ERP-17-0076/video-3. The clot thickens: an incompletely ligated left atrial appendage Merrill Thomas, Anna Grodzinsky, and Martin Zink 2018. 5:K41-K45 DOI: 10.1530/ERP-17-0076 Download Original Video